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What Bike is it.?
Where's the wiring diagram?
The lighting coil feeds power to the yellow wire to the lights and to a shunt regulator.
The coil can produce excessive voltage if not regulated. The regulator shorts out the excessive voltage to ground. A zener diode does the regulating by its reverse bias voltage setting. 12.6 volts. once the zener conducts it turns on a triac (SCR silicon controlled rectifier) that grounds the circuit for that pulse and regulating the output voltage.. This happens on every pulse of power.

If you run with the regulator disconnected you blow out all the lights/tack/whatever is in the circuit. So that's a nono.
You can unplug the stator wires and run test on the coil that way.

In the case where the light go bright the power for this effect is coming from the rear lights and the battery. It's a backfeed.

the bike is split in 2 electrical systems. AC for lighting and DC for battery. When you hit the brakes you are connecting both AC and DC systems togather briefly. That's whats up.

The original issue is too much draw / or a bad ground/or a melted connector somewhere/ a defected (open) diode.
Welcome to the club..
Have a Drink.

look at the headlight lamp (s) see if both high and low are on at the same time. This will cause to big a load on the ac coil and it will limit the power to 65 watts. If both filiments are on the load will be in excess of 65 watts and the result is a low voltage condition because the coil acts like an inductor.

If you ask the coil for too much power it simple can't produce it. Nothing burns up, it regulates itself. It is ingenious, by design because it wont start a fire. It is like the best of both worlds.

So you are looking for a power consumption issue. Something is drawing too much power. Find it.

First clue is take out one lamp if you have duals. then try take out the other one. see if the bulb is shorted or the contacts are touching making the high and low come on together.

You are not the first one to see this. Someone else had the same issue a while back. It is wierd.



<strong> Don't ever run bike with the regulator unplugged.</strong>

What he said

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modify profile
fillin password
avator set size to 100x100
add image from server with short code like
[img]http://mysuckywebsite.com/images/heyyallwhatsup.jpg[/img]


for signature make a picture to the correct size like 600x150 or 700x200 ,u get the idea, crop
put it on your server. link to it.
with bbshorty code (bulliten Board short code)
[img]http://mywebsite.com/images/picyure.jpg[/img]

you have to figure out where to put images

Image Shacks' clouds' whatever' like "photobucket" do have links all ready set up copy and paste them. Their easyer than setting up u'r own server but that aint no FUN

I use GIMP for the image work and a public server for the images, and I still don't yell at my chihuahuas..

Too Much Vacuum in the crankcase.
Put some compressed air in the vent Hole.

That's normal. the scooter is not really a scooter, you think it is but it is a Metatron Cube energy field altered state transport machine.,,
So it is not what it seems..

My HID is so Bright They wear shades on the International Space Station when they fly over me.